<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>样式的顺序.html</title>
	<style>
		.red{
			color: red;
		}
		.blue{
			color: blue;
		}
	</style>
</head>
<body>
	<div class="red blue">这是什么颜色</div>
	<div class="blue red">这是什么颜色</div>
</body>
</html>